hehe.org/user/plugins/vimeo/admin/editor-button/js/button.coffee

(($) ->
  $ ->
    $('body').on 'grav-editor-ready', ->
      Instance = Grav.default.Forms.Fields.EditorField.Instance
      Instance.addButton vimeo:
        identifier: 'vimeo-video'
        title: GravVimeoPlugin.translations.EDITOR_BUTTON_TOOLTIP
        label: '<i class="fa fa-fw fa-vimeo"></i>'
        modes: [
          'gfm',
          'markdown'
        ]
        action: (e) ->
          e.button.on 'click.editor.vimeo', ->
            videoId = prompt(GravVimeoPlugin.translations.EDITOR_BUTTON_PROMPT);
            if videoId
              text = "[plugin:vimeo](https://vimeo.com/#{videoId})"

              pos    = e.codemirror.getDoc().getCursor(true)
              posend = e.codemirror.getDoc().getCursor(false)

              for l in [pos.line..posend.line]
                e.codemirror.replaceRange( text + e.codemirror.getLine(l), { line: l, ch: 0 }, { line: l, ch: e.codemirror.getLine(l).length })

              e.codemirror.setCursor({ line: posend.line, ch: e.codemirror.getLine(posend.line).length })
              e.codemirror.focus()
              return
          return
      return
    return
  return
) jQuery